Lin Yu was stunned, and Li Zheng had already picked up the acoustic guitar.

And, spread it flat on the thigh.

Like a zither, press the strings with your left hand and pluck with your right hand.

This operation really shocked Lin Yujing.

This posture of playing the piano is no longer a problem of music idiots, right?

I don't even have basic music knowledge!

However, Li Zheng himself is calm.

Between melancholy.

Even, exuding some force.

In his thoughts, this scene corresponds to the scene in "Smiling Proud Jianghu", where the Demon Sect elder Qu Yang and the decent head Liu Zhengfeng played together.

Therefore, he swings the guitar horizontally and pretends to be a guqin.

The song is high and low, and it is difficult to find a bosom friend.

Lin Yujing, you taste, you taste.

"Hmm......" Lin Yujing just sighed, and suddenly felt bored.

I was looking forward to this scumbag pig's trotters just now, it's crazy.

"You better go and score Jiang Qinghua, I'm resting. ”

Lin Yujing puffed on the piano, and then fell asleep again.

Seeing this, Li Zheng was a little disappointed, but after a little taste, it became wonderful again.

In "Smiling Proud Jianghu", the song between Qu Yang and Liu Zhengfeng is the ensemble of the piano and flute.

And Lin Yujing is not a guest, Jiang Qinghua is.

Therefore, she was jealous and said that she should score for Jiang Qinghua.

Li Zheng thought he had thought of the second layer, but Lin Yujing was already on the third layer.

In front of such a master, don't show off.

"Alright, no more fuss. Li Zheng said and took off his leather jacket and hung it on the back of the chair, and then rolled up the sleeves of his shirt quite imposingly, "Sure, you want guitar accompaniment, right?"

Lin Yujing only fanned her hand casually, and then fell asleep again.

Li Zheng also ignored her anymore and looked at the relaxation interface.

Lin Yujing is obviously immune to emotional intelligence moves.

There's no way, let's do it.

【Li Zheng】

[Game Currency: 25]

[Relaxation Activity Detected: Musical Instrument Performance]

[Vitality regeneration rate: 0.3 (playing guitar).] 】

[Daily recovery limit: 60 minutes.] 】

[You can get related skills by throwing coins——]

[Modern Music Theory: Comprehensively master the knowledge of modern music theory. (5 in-game coins)

[Breath of Qi: Master whistle, sheng, suona, flute, harmonica, French horn, etc., and play musical instruments with 'vibration of qi' as the core, which is equivalent to the level of ordinary professional performers. (5 in-game coins)

[Finger of string sound: Master the piano, erhu, guzheng, violin, guitar, etc., and play musical instruments with 'string vibration' as the core.] (10 in-game coins)

[The power of membrane sound: Master the performance of musical instruments with the 'vibration of the membrane' as the core, such as drum kits, drums, and tambourine.] (5 in-game coins)

Li Zheng looked at these skills, not to mention anything else.

It's so imposing.

I'd love to order it all.

Unfortunately, the in-game currency is limited.

I'm afraid that only by taking the depraved route can I get it all.

Now it seems that at least the combination of [Modern Music Theory] + [Fingers of Strings] is needed.

Although the 15 game currency is a little distressing, it is also excellent to have a daily relaxation project in the future.

Li Zheng didn't think much about it anymore, he put coins in a chic way, and his skills were put into storage.

[Detected an increase in the level of instrument playing]

[Daily recovery limit: 90 minutes↑]

With the arrival of new knowledge, Li Zheng's eyes widened and became more and more wonderful.

After a few seconds, Li Zheng rubbed his cheeks and sighed softly: "I see, it's ......."

He has always believed that music is a subtle art discipline, and he has tried to comprehend it from the perceptual.

But in fact, it is completely wrong.

Miss by a mile.

The essence of music.

It's math!

And a little bit of physics and materials science.

The reason is simple, all sound is based on the vibration of matter.

The material of the substance determines the timbre.

The frequency of the vibration determines the pitch.

The interval between the vibrations determines the beat.

The mixture of vibrations is music.

In this, except for the material, everything else is a simple proportional sequence problem.

For example, an octave of a piano has a total of 12 keys, Do to Si, 7 white keys, plus 5 black keys.

Among them, the first key C, that is, Do, is the customary, comfortable sounding starting point of the scale, and its vibration frequency can be measured as F0.

Then, according to human listening habits, the last note of this scale, B, that is, Si, has a vibrational frequency of 2F0, which is just doubled.

The opening and ending vibrations are determined, and all that remains is to divide the frequencies of the remaining 10 notes.

Intuitively, it seems that in this case, it would be nice to use an equal difference series so that the frequency of each note differs by 1/12.

But in fact, the human ear distinguishes the high and low of two tones by the frequency ratio between the two tones, not by the frequency difference.

A normal person can clearly distinguish between 50Hz and 55Hz, but it is difficult to distinguish between 5000Hz and 5005Hz.

Therefore, it is necessary to divide the proportional series here.

According to junior high school mathematics, the direct frequency ratio of each note in this sequence should be 2 to the 12th root.

That is, 1.01530947.

Using this ratio as a proportional sequence, an octave scale is made.

This is exactly the twelve-tone rhythm commonly used in modern music theory.

It was initiated by Zhu Yuanzhang, one of Zhu Yuanzhang's grandsons.

One thing to say, 2 open 12 power roots, it's still a bit scary.

In order to calculate this, he did not hesitate to make a set of 81-bit abacus.

As for how long it has been counted, no one knows.

Hats off to the math gurus.

Incidentally, Pythagoras, the inventor of the earlier ancient rhythms, was also a mathematician.

At this time, Li Zheng remembered the stave, the beat, and the rising and falling tone.

Between the lines, inside and out.

It's all math!

"Wonderful!" Li Zheng felt that the music was so interesting for the first time, and he couldn't wait to pick up the guitar and start twisting the strings to tune.

For beginners, this process often requires a tuning fork or timpani to determine the benchmark tone.

But Li Zheng, an ordinary professional performer, is enough to identify by just his ears.

Thinking that every time the strings are tightened, the vibration frequency of the strings will produce wonderful changes, rippling out the beauty of mathematics, and Li Zheng is also getting more and more energetic.

He went back and forth, comparing the sound of each string "oooh", and his mind was already full of proportional sequences.

Hearing this decent tuning sound, Lin Yujing, who was sleeping on her stomach, also twisted slightly, as if in a classroom, peeking through a reasonable gap.

I saw Li Zheng's expression flushed, twisting left and right, and muttering about the root number or something.

The whole person rippled with the strangeness of the piano demon.

Lin Yujing was also shocked.

How can you play the piano and play the feeling of doing the Olympiad?

She twisted her hair a few more times, brushed her hair away, exposed her left ear, and listened carefully.

If it were someone else, I was afraid that I wouldn't be able to hear any clues.

But Lin Yujing trembled as soon as she heard it.

Whew—

The first string, treble mi.

Whew—

The second, alto si.

Whew—

The so.

......

Sixth, bass mi.

Yes, all right.

It turned out to be the right tune!

In astonishment, Li Zheng swept the strings, suddenly raised his head, rolled his eyes demonically, and glared at Lin Yujing's left eye with great precision just by intuition.

The internal work has been accomplished.

Let's fight!

This time, Li Zheng left no room for anything, and said straightly: "Have you found the score?"

Lin Yujing's heart suddenly beat faster, and she was so frightened that she shrank back and pretended to sleep.

That's not good.

Li Zheng frowned and said, "What do you mean, didn't you ask me if I knew how to play a guitar and wanted to learn from each other?"

"I ...... I ......" Lin Yujing struggled for a moment, then suddenly clenched his fists and got up, and went straight to the door, "I'm thirsty, go get the kettle." ”

Li Zheng didn't expect that a person who was originally sleeping on his stomach could "swish" and disappear like this.

But at this time, he had just understood the wonders of mathematics and music, and he was in a good mood, but he was not angry, and it was a big deal to play with Jiang Qinghua's qin and flute, and it was not bad to think about it.

Outside the classroom, Lin Yujing didn't go to get any kettle, but ran to the big tree in the innermost part of a row of bungalow classrooms, holding her waist and panting.

Actually, it's not that she doesn't want to win glory for the school, nor is she playing tricks on Li Zheng.

It's just a simple fear of crowds.

is different from Li Zheng's heroism of "blame me for looking like this, you can look at it casually".

It is also different from Zhang Xiaoke's kind of "hahahaha, sure enough, I am the cutest~~".

Lin Yujing was very afraid of being stared at.

Not to mention being stared at by so many people.

Not to mention being stared at with Li Zheng.

Playing basketball on the playground is already the limit of her acceptance.

Performing in public, performing in front of people from other schools, she still can't take this step.

Between gasps, an electronic sound effect of "Rocket into orbit" came from the pocket of the sweatshirt.

Lin Yujing's ears stood up, and he took out his mobile phone with some confusion.

This is actually just a WeChat prompt sound, which is equivalent to other people's "oh oh".

Lin Yujing thought it was a message from Li Zheng, but she didn't expect the sender to be [(rocket) mother (rocket)].

Of course, this is actually a note set by her, but it is actually her mother Shen Tinglan.

[Mother: Someone has a birthday tomorrow. 】

[Lin Yujing: ???You're June?]

[Mother: (smiley) Yes, who else will it be on December 25th?]

[Lin Yujing: ...... Jesus?】

[Mother: Guess again.] 】

[Lin Yujing: ............ Grandpa Mao?】

[Mother: (covering her face and crying) It's Li Zheng. 】

[Lin Yujing: ???]

[Mom: I happened to see it from his father's circle of friends (whistling)]

[Lin Yujing: Liar, you never look at the circle of friends!]

[Mom: The experiment is about to start, turn it off.] 】

[Mother: By the way, I can't come back before 12 o'clock, you can eat by yourself, and you can also eat with your classmates.] 】

[Lin Yujing: You're turning off the phone!]

[Mom: (Flying Kiss) (Flying Kiss) (Flying Kiss)]

Putting away the phone, Lin Yujing was very angry.

Why do you suddenly notify people of such useless news?

What she didn't know was that Li Zheng was also looking at his mobile phone in the music classroom at this time.

[Lao Li: I forgot to call just now, do you remember what day tomorrow is?]

[Li Zheng: ...... Sick of it. 】

[Lao Li: I don't blame you, my pot, I didn't expect it to be so accurate on this day. 】

[Li Zheng: Is there anything to do?]

[Lao Li: There are a few major surgeries today, and I can't go back before 12 o'clock, so you can ask your classmates out to celebrate their birthdays, and I will reimburse you. 】

[Li Zheng: Oh. 】

[Lao Li: So...... Have you figured out who to date?]

[Li Zheng: Aren't you very busy with surgery?]

[Lao Li: Aren't you in class?]

[Li Zheng: Biology class. 】

[Lao Li: Oh, oh, that's. 】

Li Zheng put away his mobile phone, and his original good attitude was ruined by Lao Li.

Birthdays are annoying.

It was an awkward time on December 25.

Don't let your classmates know.

Li Zheng's mentality had just been adjusted, and he saw Lin Yujing sneaking in with small steps, and was lying on the piano in a blink of an eye.

Li Zheng ignored her and kneading the strings to test the sound by himself.

After a while, Lin Yujing suddenly stomped her foot.

Li Zheng looked up: "Huh?"

Lin Yu was silent and silent.

Li Zheng shook his head and continued to rub it.

It didn't take long for him to stomp his foot again.

Li Zheng raised his head again: "Huh?"

"You ......" Lin Yujing squirmed for a moment, and then barely squeezed out a few words, "You said it yourself." ”

"Say what?"

Boom! Stomp your foot again.

Li Zheng thought about it and quickly smiled.

Sure enough, when she heard my piano, she couldn't help but want to cooperate.

But it was so inconsistent before.

Now, I'm just looking for a staircase.

"Okay, I say. Li Zheng raised his hand and smiled, "I want to collaborate with you, can you please find a guitar accompaniment score." ”

Lin Yujing finally didn't stomp her feet this time, only twisted her body, and her eyes showed through her hair: "That...... Then you have to pay it back...... On November 1st, remember clearly ......"

"???" Li Zheng looked confused, "Did I miss a sentence?"

Knock knock!

Lin Yujing stomped her feet three times in a row.

"Scum, stunned, pig, hoof!"

"???" Li Zheng fell into deep reflection.

Do I have to pay it back?

What else?

November 1st?

What is this......

Wait a minute......

Don't......

"You...... Know me...... Tomorrow?" Li Zheng swallowed and foamed.

Lin Yujing didn't speak, indicating acquiescence.

"So, you're November...... Number 1?"

Stomp your feet!

Li Zheng understood the situation just now this time.

She is using her participation in the show as a bargaining chip to exchange birthday gifts.

Hmph, what a naïve woman.

But then again, this time she did ask Lin Yujing, and she used this for a future birthday gift, but she didn't say anything.

"Good, good, deal. Li Zheng nodded generously, "November 1st, right? ”

“~~~~~”

"What are you shaking?"

Lin Yujing trembled and felt comfortable, then sat up straight, straightened his hair, and said casually: "That...... You play an etude first, and you have to pass it. ”

When Li Zheng heard this, his eyes widened.

The whole person panicked.

Although he is a master of music theory, he is a professional string player.

But actually.

Not a single tune.

It's like a master with top-level internal skills, but he can't even fight military body boxing.

It's embarrassing.

Seeing this, Lin Yujing pouted: "Ha! ”

"Damn......" Li Zheng scratched his head irritably.

No, I'm going to play something.

Come and think about it.

The most familiar melody.

It can only be that.

It's going to be around that melody and play tricks.

According to the mathematical rules of rhythmic matching, as well as the mathematical principles of chords, supplemented by commonly used soundtrack sets......

Li Zheng lowered his head, and his left hand kneaded the thickest two strings by feeling.

The right hand finds the beat after two taps on the body, and then cuts in at the right time, and the thumb quickly plucks the two thick strings.

The bass accompaniment with the feeling "Bang Bang" sounds.

Although it is played on the guitar, this fast-paced bass is very much like a bass.

This series of rapid plucking strings also shocked Lin Yujing and opened his mouth slightly.

But the fried hair didn't last long.

Because Li Zheng began to sing.

"Two, Tiger ......"

"Two, Tiger ......"

"Run fast (broken) ......"

Half a minute later, the song "Two Tigers" was sung.

Li Zheng pressed the strings and raised his head angrily: "Hmph, how?"

Lin Yujing is still in the middle state of "fried hair" and "let me die", and she can't say a word.

With god-level accompaniment and ghost-like singing, it feels like eating a cheesecake with soy sauce poured over it.

After a long time, Lin Yujing said what she wanted to say half a minute ago: "You are still ...... Don't open your mouth anymore. ”

"Oh?" Li Zheng raised his eyebrows, "That is, are you satisfied with my fingering?"

Although she was very reluctant, Lin Yujing still bit her lip and nodded: "Try it......"